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An extension of Bernstein-Bezier surface over the triangular domain

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Progress in Natural Science:Materials International 2007年第3期17卷 352-357页

作者： cao Juan and WANG Guozhao (Institute of Image Processing and Computer Graphic, department of Mathematics,{2., hangzhou 3.002., china) Institute of Image Processing and Computer Graphic Department of Mathematics Zhejiang University Hangzhou 310027 China

In this paper, a set of quasi-Bernstein polynomials of degree n with one parameter is presented, which is an extension of the Bernstein polynomials over the triangular domain. Using the presented polynomials as basis functions, we construct a class of shape adjusting surfaces defined over the triangular domain with a shape parameter, namely, quasi-B-B parametric surfaces. These surfaces share many properties with the B-B parametric surfaces. In particular, when shape parameters equal 1, they degenerate to be the B-B parametric surfaces. By changing the value of the shape parameter, we can get different surfaces under the fixed control net.

关键词： triangular domain shape parameter Bezier surfaces.

Blake-Wilson,Johnson & Menezes protocol revisited

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Science china(Information Sciences) 2011年第7期54卷 1365-1374页

作者： HUANG Hai 1,2.& cao ZhenFu 1 1 department of Computer Science and Engineering,Shanghai Jiaotong {2.,Shanghai 2.02.0,china 2.Division of Computer,zhejiang Sci-Tech {2.,Xiasha Higher Education Zone,hangzhou 310018,china 1. department of Computer Science and Engineering Shanghai Jiaotong University Shanghai 200240 China2. Division of Computer Zhejiang Sci-Tech University Xiasha Higher Education Zone Hangzhou 310018 China

In this paper,we investigate the famous Blake-Wilson,Johnson & Menezes (BJM) authenticated key exchange *** observe that the BJM model fails to model the adversary’s capability in the public setting *** modify the BJM model by providing it with a new Register query and a modified Corrupt *** way,we bring the BJM model further to ***,our modification has a significant impact on the security proof of the BJM ***,the security proofs using CDH assumption will no longer work in the modified BJM *** some modifications,we show that the BJM protocols are secure in the modified BJM model under the gap Diffie-Hellman assumption (GDH).

关键词： authenticated key exchange provable security BJM model gap Diffie-Hellman

Electrochemical properties of some cobalt antimonides as anode materi-als for lithium- ion batteries

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Rare Metals 2003年第4期22卷 298-303页

作者： ZHAO Xinbing, cao Gaoshao, ZHANG Lijuan, and XIE Jiandepartment of Materials Science and Engineering,{2., hangzhou 3.002., china department of Materials Science and Engineering Zhejiang University Hangzhou 310027

Some cobalt antimonides have been prepared and studied as the candidate anodematerials for lithium ion batteries. Reversible capacities of 42.,42. and 546 mA.h.g^(-1) weremeasured at the first cycle for as-solidified CoSb_2. CoSb_3 and annealed CoSb_3 respectively. A lowlithium ions diffusion coefficient in the order of 10^(16) m^2.s^(-1) was estimated from thecoulometric titration measurements in the annealed CoSb_3 electrode. It was found that theelectrochemical properties of fine powders are significantly better than coarse powders. However theSEM picture shows that the nano-sized CoSb_3 powders gathered to larger granules, which worsenssomewhat the capacity retention of the nano-sized materials, although the volume capacities of theannealed and ball milled CoSb_3 remain near twice of that of graphite after 50 cycles.

关键词： Electrochemistry cobalt antimonides electrochemical analysis anodematerials lithium-ion batteries

Impacts of pancreatic exocrine insufficiency on gut microbiota

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Journal of zhejiang university-Science B(Biomedicine & Biotechnology) 2024年第4期25卷 271-279页

作者： Yulin GUO Feng cao Fei LI department of General Surgery Xuanwu Hospital of Capital Medical UniversityBeijing 100053China Acute Pancreatitis Clinical Center of Capital Medical university Beijing 100053China

Pancreatic exocrine insufficiency(PEI)can be induced by various kinds of diseases,including chronic pancreatitis,acute pancreatitis,and *** main pathogenetic mechanism of PEI involves the decline of trypsin synthesis,disorder of pancreatic fluid flow,and imbalance of secretion *** studies have shown that PEI could induce gut bacterial overgrowth and dysbiosis,with the abundance of Lactobacillus and Bifidobacterium increasing the most,which could be partially reversed by pancreatic enzyme replacement *** studies have also confirmed the association between PEI and the dysbiosis of gut *** exocrine secretions and changes in duodenal p H as well as bile salt malabsorption brought about by PEI may affect and shape the abundance and composition of gut *** turn,the gut microbiota may impact the pancreatic exocrine acinus through potential bidirectional *** forward,more and higher-quality studies are needed that focus on the mechanism underlying the impact of PEI on the gut microbiota.

关键词： Pancreatic exocrine insufficiency Gut microbiota Gut microbiome Pancreatic enzyme replacement therapy

Response of Stream Pollution Characteristics to Catchment Land Cover in cao-E River Basin, china

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Pedosphere 2011年第1期21卷 115-123页

作者： SHEN Ye-Na LUE Jun CHEN Ding-Jiang SHI Yi-Ming department of Natural Resources College of Environmental Science and Natural Resources Zhejiang University Hangzhou 310029 (China) china Ministry of Education Key Lab of Environmental Remediation and Ecological Health Zhejiang University Hangzhou 310029 (China) zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition Zhejiang University Hangzhou 310029 (China)

This study addressed the relationship of river water pollution characteristics to land covers and human activities in the catchments in a complete river system named cao-E River in eastern *** on the hydrogeochemical data collected monthly over a period of 3 years,cluster analysis(CA) and principal component analysis(PCA) were adopted to categorize the river reaches and reveal their pollution *** to the differences of water quality in the river reaches and land use patterns and average population densities in their catchments,the whole river system could be categorized into three groups of river reaches,i.e.,non-point sources pollution reaches(NPSPR),urban reaches(UR) and mixed sources pollution reaches(MSPR).In UR and MSPR,the water quality was mainly impacted by nutrient and organic pollution,while in NPSPR nutrient pollution was the main *** nitrate was the main nitrogen form in NPSPR and particulate phosphorus was the main phosphorus form in *** were no apparent trends for the variations of pollutant concentrations with increasing river flows in NPSPR and MSPR,while in UR the pollutant concentrations decreased with increasing river *** dry season was the critical period for water pollution control in ***,catchment land covers and human activities had significant impact on river reach water pollution type,nutrient forms and water quality responses to hydrological conditions,which might be crucial for developing strategies to combat water pollution in watershed scale.

关键词： cluster analysis hydrological conditions pollution factors principle component analysis water quality

Synthesis and electrochemical performance of YF_3-coated LiMn_2._4 cathode materials for Li-ion batteries

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Rare Metals 2011年第1期30卷 39-43页

作者： cao Jina cao Gaoshao YU Hongming XIE Jian ZHAO Xinbing department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Spinel LiMn2.4 cathodes were coated with 1 mol% YF3.X-ray diffraction（XRD） analyses showed that Y and/or F did not enter the lattice of the LiMn2.4 *** electron microscopy（TEM） showed that a compact YF3 layer of 5-2. nm in thickness was coated onto the surface of LiMn2.4 *** electron microscopy（SEM） observation showed that the YF3 coating caused the agglomeration of LiMn2.4 *** cycling test demonstrated that the YF3 coating can improve the electrochemical performance of LiMn2.4 at both 2. and 55°***,YF3-coated LiMn2.4 exhibited an improved rate capability compared with the uncoated one at high rates over *** immersion test in electrolytes showed that YF3-coated LiMn2.4 is more erosion resistant than the uncoated one.

关键词： lithium batteries coatings cathodes electrochemical properties

Periodontal status and associated risk factors among childbearing age women in Cixi City of china

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Journal of zhejiang university-Science B(Biomedicine & Biotechnology) 2013年第3期14卷 231-239页

作者： Yan-min WU Jia LIU Wei-lian SUN Li-li CHEN Li-guo CHAI Xiang XIAO Zheng cao department of Oral Medicine the Second Affiliated HospitalSchool of MedicineZhejiang University department of Oral Medicine Cixi Huayang Dental Hospital department of Dentistry Sir Run Run Shaw HospitalSchool of MedicineZhejiang University

Objective:To investigate the periodontal status and associated risk factors among women of childbearing age to increase the awareness of oral ***:The study was conducted on childbearing age women in Cixi,a city in zhejiang Province in the southeast of china.A total of 754 women participated in periodontal examination while receiving prenatal *** of the women were collected from the Cixi Family Planning Commission and during an *** periodontal indices,such as bleeding on probing(BOP),probing depth(PD),and clinical attachment level(CAL) were measured during the *** analysis on subject-based data was ***:The prevalence of periodontal disease among childbearing age women in Cixi was high(84.7%).A significant association was found between the disease and educational level,pregnancy,taking oral contraceptives,stress,alcohol consumption,overweight,dental visit,and teeth brushing(P<0.05).Women who suffered periodontal disease showed deep PD,obvious BOP,and clinical attachment *** this population,pregnancy was closely associated with higher BOP percentage;teeth brushing no more than once per day or brushing for less than 1 min(P<0.001) after adjusting for age and ***:The periodontal status of childbearing age women in Cixi needs to be improved *** towards the periodontal health should be warranted,especially for those in special statuses and with poor awareness.

关键词： Periodontal status Childbearing age women Risk factors Pregnancy

Effect of transcranial direct current stimulation on postoperative sleep disturbance in older patients undergoing lower limb major arthroplasty:a prospective,double-blind,pilot,randomised controlled trial

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General Psychiatry 2024年第2期37卷 224-233页

作者： Jie Yang Mingshu Tao Rongguang Liu Jiaxing Fang Chunyan Li Dexian Chen Qi Wei Xingyu Xiong Wenxin Zhao Wen tan Yuan Han Hongxing Zhang He Liu Song Zhang Junli cao department of Anesthesiology The Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsuChina department of Anesthesiology Hospital of Chengdu University of Traditional Chinese Medicine&Traditional Chinese Medicine Hospital of Sichuan ProvinceChengduSichuanChina NMPA Key Laboratory for Research and Evaluation of Narcotic and Psychotropic Drugs&Jiangsu Province Key Laboratory of Anesthesiology&Jiangsu Key Laboratory of Applied Technology of Anesthesia and Analgesia Xuzhou Medical UniversityXuzhouJiangsuChina department of Anesthesiology Eye&ENT Hospital of Fudan UniversityShanghaiChina department of Anesthesiology&Clinical Research Center for Anesthesia and Perioperative Medicine&Huzhou Key Laboratory of Basic Research and Clinical Translation for Neuromodulation The Fifth School of Clinical Medicine of Zhejiang Chinese Medical University||Huzhou Central Hospital||The Affiliated Huzhou HospitalZhejiang University School of Medicine||Affiliated Central Hospital Huzhou UniversityHuzhouZhejiangChina department of Anesthesiology Renji Hospital School of MedicineShanghai Jiao Tong UniversityShanghaiChina

Background Postoperative sleep disturbance(PSD)is a common and serious postoperative complication and is associated with poor postoperative *** This study aimed to investigate the effect of transcranial direct current stimulation(tDCS)on PSD in older patients undergoing lower limb major *** In this prospective,double-blind,pilot,randomised,sham-controlled trial,patients 65 years and over undergoing lower limb major arthroplasty were randomly assigned to receive active tDCS(a-tDCS)or sham tDCS(s-tDCS).The primary outcomes were the objective sleep measures on postoperative nights(N)1 and *** 116 inpatients were assessed for eligibility,and a total of 92.patients were enrolled;47 received a-tDCS and 45 received *** improved PSD by altering the following sleep measures in the a-tDCS and s-tDCS groups;the respective comparisons were as follows:the promotion of rapid eye movement(REM)sleep time on N1(64.5(33.5-105.5)vs 19.0(0.0,45.0)min,F=2..10,p1)and N2.75.0(36.0-12..8)vs 30.0(1.3-59.3)min,F=12.55,p1);the total sleep time on N1(506.0(408.0-561.0)vs 392.0(2.3.0-483.5)min,F=14.13,p1)and N2.488.5(455.5-548.5)vs 346.0(2.6.5-517.5)min,F=7.36,p=0.007);the deep sleep time on N1(130.0(103.3.1.7.0)vs 42.5(9.8-100.8)min,F=2..4,p1)and N2.103.5(46.0-154.8)vs 57.5(2..3.1.6.5)min,F=8.4,p=0.004);and the percentages of light sleep and REM sleep on N1 and N2.p<0.05 for each).The postoperative depression and anxiety scores did not differ significantly between the two *** significant adverse events were *** In older patients undergoing lower limb major arthroplasty,a single session of anodal tDCS over the left dorsolateral prefrontal cortex showed a potentially prophylactic effect in improving postoperative short-term objective sleep ***,this benefit was temporary and was not maintained over time.

关键词： sleep stimulation postoperative

Influence of the penetration of adjacent X-section cast-in-place concrete(XCC)pile on the existing XCC pile in sand

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Journal of zhejiang university-Science A(Applied Physics & Engineering) 2024年第7期25卷 557-572页

作者： Peng ZHOU Jianhui XU Changjie XU Guangwei cao Jie CUP Xuanming DING School of Civil Engineering and Architecture State Key Laboratory of Performance Monitoring and Protecting of Rail Transit InfrastructureEast China Jiaotong UniversityNanchang330013China Guangdong Key Laboratory of Earthquake Engineering and Application Technology Earthquake Engineering Research&Test CenterGuangzhou UniversityGuangzhou510006China Key Laboratory of New Technology for the Construction of Cities in Mountain Areas College of Civil EngineeringChongqing UniversityChongqing400045China Zijin School of Geology and Mining Fuzhou UniversityFuzhou350116China

A series of small-scale 1g X-section cast-in-place concrete(XCC)pile-penetration model tests were conducted to study the effects of soil density and pile geometry on the lateral responses of an existing pile and the variations in surrounding soil *** results showed that the bending patterns of existing XCC piles varied with penetration *** lateral response of the existing pile was sensitive to the change in relative density and pile *** example,the bending moment of the existing pile increased along with these *** development of the radial stressσ′r/σ′v0 of the soil around an existing pile showed different trends at various depths during the penetration of the adjacent ***,the change in radial stress during the penetration of the XCC pile did not exhibit the“h/R effect”that was observed in the free-field soil,due to the shielding effect of the existing *** peak value of radial stressσ′r_max/σ′v0 decreased exponentially as the radial distance r/R *** attenuation ofσ′r_max/σ′v0 with r/R in the loose sand was faster than in the medium-dense or dense ***σ′r_max/σ′v0 at the same soil location increased with the cross-section geometry parameter.

关键词： X-section cast-in-place concrete(XCC)pile Test Penetration Sand Lateral response Radial stress